Did you know these 7 Core Web Vitals nuances?

Did you know these 7 Core Web Vitals nuances?
Core Web Vitals nuances

We all know Core Web Vitals report shows URL performance grouped by status (Poor, Need improvement, Good), metric type (CLS, FID, LCP), and URL group (groups of similar web pages). The report is based on three metrics as measured by actual user data: LCP, FID, and CLS.

Key elements of core web vitals 

๐€๐ฅ๐ฅ ๐‚๐ก๐ซ๐จ๐ฆ๐ž ๐ฏ๐ž๐ซ๐ฌ๐ข๐จ๐ง๐ฌ

As other browsers (Edge, FF, Opera, Safari) are not tracked, this should properly read: Google Chrome-only.

Some (less technical) stakeholders might not understand that from reading Google's description.

๐Œ๐š๐ง๐ฒ ๐ฌ๐š๐ฆ๐ฉ๐ฅ๐ž๐ฌ

Yes, based on actual users, your own site visits!

This completely contrasts this with the Lighthouse score below the fold.

๐…๐ฎ๐ฅ๐ฅ ๐ฏ๐ข๐ฌ๐ข๐ญ ๐๐ฎ๐ซ๐š๐ญ๐ข๐จ๐ง๐ฌ

Lighthouse only tracks the initial pageload. No interactions.

Some individuals believe that this holds true for actual #UX data as well. Yet, tracking of CLS and, for instance, INP continues after the page has loaded.

Various Network Connections

Although there are browser-limitations, all mobile, desktop and tablet visits are tracked. The same applies to someone's internet speed.

You can't do real deep-diving though (you can, but only on a monthly and site wide basis) and users can actually opt-out.

Country Data

The same applies to your audience's location: Google / Core Web Vitals doesn't look at country-level data.

Sure, your .my homepage might only get visitors from MY But if you have an international (even if it's only Malay, that will rank in other countries too) audience, they will be impacting your site wide or even page specific #SEO ranking too.

๐Ž๐ซ๐ข๐ ๐ข๐ง ๐๐š๐ญ๐š

Only traffic on your own domain becomes part of your Core Web Vitals. Subdomains will get their own CWV assessment and thus their own ranking impact (could be your solution to address international audience's impact ๐Ÿ˜œ this isn't my advice though)

28-๐๐š๐ฒ ๐œ๐จ๐ฅ๐ฅ๐ž๐œ๐ญ๐ข๐จ๐ง ๐ฉ๐ž๐ซ๐ข๐จ๐

Any pageviews that happened 29 days ago, isn't part of this data anymore. But also: visits after your latest deploy or replat forming are aggregated together with older data. Giving devs, SEO or product owners a hard to draw conclusions.

Nevertheless, #CoreWebVitals is still a great (and free ๐Ÿ‘Œ) start if either:
โ†’ your site started growing only recently;
โ†’ your company is new to #RUM / real UX data;
โ†’ your site is already doing good and you're only into it for #SEO ๐Ÿ˜œ

Post Credit: Orginal content was first posted by "Erwin Hofman" in LinkedIn.

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